def fun(a):
    b = a ** 2
    return b


f = fun(10)

# 调用函数
print(fun(10))

print(fun)

p = lambda x, y, z: x ** 2 + y ** 2 + z ** 2

print(p(10, 20, 30))


#  写死参数和返回值类型
def fun2(a: int) -> int:
    return a ** 2


r = fun2()
